Ideally it is preferable to make the soap dough with the color mixed into the oils before lye-water is added. I use soap stable micas; some from TKB Trading, Nurture Soap Supply and a few other places.

First try making the basic colors, or primary colors – red, blue and yellow. With these prime colorsthe secondary and tertiary colors can be made. Having white soap dough will give tints of any of these colors.

Here is a video sharing when soap dough has not been made properly and what it looks like when it has been made properly.